Description: Camp Hardin was a military training camp located in Sand Lake, Rensselaer County, New York. It was constructed in 1860 for the purpose of training Union Army recruits from the Troy area for combat in the Civil War. The camp was named for a Regimental Commanding Officer of the 2nd NY Vol. Infantry. In 1898, it was used as a demobilization camp for the 2nd NY Vol. Infantry and was occupied from August to September of that year.